[edk2-devel] [PATCH V3 19/29] OvmfPkg: Enable Tdx in SecMain.c
Min Xu
min.m.xu at intel.com
Mon Nov 1 13:16:08 UTC 2021
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429
When host VMM create the Td guest, the system memory informations are
stored in TdHob, which is a memory region described in Tdx metadata.
The system memory region in TdHob should be accepted before it can be
accessed. So the major task of this patch set is to process the TdHobList
to accept the memory. After that TDVF follow the standard OVMF flow
and jump to PEI phase.
PcdTdxAcceptChunkSize & PcdTdxAcceptPageSize are added for page accepting.
They're the default settings of the chunk size and the Accept page size.
PcdUse1GPageTable is set to FALSE by default in OvmfPkgX64.dsc. It gives
no chance for Intel TDX to support 1G page table. To support 1G page
table this PCD is set to TRUE in OvmfPkgX64.dsc.
3 Tdx specific libs are used by OvmfPkgX64:
- TdxLib
- TdxMailboxLib
TDX only works on X64, so the code is only valid in X64 arch.
Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Cc: Brijesh Singh <brijesh.singh at amd.com>
Cc: Erdem Aktas <erdemaktas at google.com>
Cc: James Bottomley <jejb at linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Signed-off-by: Min Xu <min.m.xu at intel.com>
---
OvmfPkg/OvmfPkg.dec | 6 +
OvmfPkg/OvmfPkgIa32.dsc | 2 +
OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
OvmfPkg/OvmfPkgX64.dsc | 6 +
OvmfPkg/Sec/IntelTdx.c | 597 +++++++++++++++++++++++++++++++++++++
OvmfPkg/Sec/IntelTdx.h | 33 ++
OvmfPkg/Sec/SecMain.c | 60 +++-
OvmfPkg/Sec/SecMain.inf | 6 +
8 files changed, 706 insertions(+), 6 deletions(-)
create mode 100644 OvmfPkg/Sec/IntelTdx.c
create mode 100644 OvmfPkg/Sec/IntelTdx.h
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index 145943532a74..ccf8fc33ce27 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -357,6 +357,12 @@
## Ignore the VE halt in Tdx
gUefiOvmfPkgTokenSpaceGuid.PcdIgnoreVeHalt|FALSE|BOOLEAN|0x58
+ ## The chunk size of Tdx accept page
+ gUefiOvmfPkgTokenSpaceGuid.PcdTdxAcceptChunkSize|0x2000000|UINT64|0x59
+
+ ## The Tdx accept page size. 0x1000(4k),0x200000(2M)
+ gUefiOvmfPkgTokenSpaceGuid.PcdTdxAcceptPageSize|0x1000|UINT32|0x5a
+
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashVariablesEnable|FALSE|BOOLEAN|0x10
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 6a5be97c059d..056055c8d799 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -243,6 +243,8 @@
[LibraryClasses.common]
BaseCryptLib|CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
VmgExitLib|UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.inf
+ TdxLib|MdePkg/Library/TdxLib/TdxLib.inf
+ TdxMailboxLib|OvmfPkg/Library/TdxMailboxLib/TdxMailboxLib.inf
[LibraryClasses.common.SEC]
TimerLib|OvmfPkg/Library/AcpiTimerLib/BaseRomAcpiTimerLib.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 71227d1b709a..27887da8f2a2 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -247,6 +247,8 @@
[LibraryClasses.common]
BaseCryptLib|CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
VmgExitLib|UefiCpuPkg/Library/VmgExitLibNull/VmgExitLibNull.inf
+ TdxLib|MdePkg/Library/TdxLib/TdxLib.inf
+ TdxMailboxLib|OvmfPkg/Library/TdxMailboxLib/TdxMailboxLib.inf
[LibraryClasses.common.SEC]
TimerLib|OvmfPkg/Library/AcpiTimerLib/BaseRomAcpiTimerLib.inf
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 52f7598cf1c7..3eb29811d822 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -247,6 +247,8 @@
[LibraryClasses.common]
BaseCryptLib|CryptoPkg/Library/BaseCryptLib/BaseCryptLib.inf
VmgExitLib|OvmfPkg/Library/VmgExitLib/VmgExitLib.inf
+ TdxLib|MdePkg/Library/TdxLib/TdxLib.inf
+ TdxMailboxLib|OvmfPkg/Library/TdxMailboxLib/TdxMailboxLib.inf
[LibraryClasses.common.SEC]
TimerLib|OvmfPkg/Library/AcpiTimerLib/BaseRomAcpiTimerLib.inf
@@ -572,6 +574,10 @@
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesCode|0x100
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesData|0x100
+ #
+ # TDX need 1G PageTable support
+ gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable|TRUE
+
#
# Network Pcds
#
diff --git a/OvmfPkg/Sec/IntelTdx.c b/OvmfPkg/Sec/IntelTdx.c
new file mode 100644
index 000000000000..a70bb61e8ee8
--- /dev/null
+++ b/OvmfPkg/Sec/IntelTdx.c
@@ -0,0 +1,597 @@
+/** @file
+
+ Copyright (c) 2008, Intel Corporation. All rights reserved.<BR>
+ (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Uefi/UefiSpec.h>
+#include <Uefi/UefiBaseType.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <IndustryStandard/UefiTcgPlatform.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/SynchronizationLib.h>
+#include <Library/TdxLib.h>
+#include <Library/TdxMailboxLib.h>
+#include <IndustryStandard/Tdx.h>
+#include <IndustryStandard/IntelTdx.h>
+#include "IntelTdx.h"
+
+#define ALIGNED_2MB_MASK 0x1fffff
+
+/**
+ BSP call this function to accept memory in a range.
+
+ @param[in] StartAddress Start address of the memory region
+ @param[in] Length Length of the memory region
+ @param[in] AcceptChunkSize Accept chunk size
+ @param[in] AcceptPageSize Accept page size
+ @retval EFI_SUCCESS Successfully accept the memory region
+ @retval Others Indicate the other errors
+**/
+EFI_STATUS
+EFIAPI
+BspAcceptMemoryResourceRange (
+ IN EFI_PHYSICAL_ADDRESS StartAddress,
+ IN UINT64 Length,
+ IN UINT64 AcceptChunkSize,
+ IN UINT32 AcceptPageSize
+ )
+{
+ EFI_STATUS Status;
+ UINT64 Pages;
+ UINT64 Stride;
+ EFI_PHYSICAL_ADDRESS PhysicalAddress;
+ volatile MP_WAKEUP_MAILBOX *MailBox;
+
+ Status = EFI_SUCCESS;
+ PhysicalAddress = StartAddress;
+ Stride = GetCpusNum () * AcceptChunkSize;
+ MailBox = (volatile MP_WAKEUP_MAILBOX *) GetTdxMailBox ();
+
+ while (!EFI_ERROR(Status) && PhysicalAddress < StartAddress + Length) {
+ //
+ // Decrease size of near end of resource if needed.
+ //
+ Pages = MIN (AcceptChunkSize, StartAddress + Length - PhysicalAddress) / AcceptPageSize;
+
+ MailBox->Tallies[0] += (UINT32)Pages;
+
+ Status = TdAcceptPages (PhysicalAddress, Pages, AcceptPageSize);
+ //
+ // Bump address to next chunk this cpu is responisble for
+ //
+ PhysicalAddress += Stride;
+ }
+
+ return Status;
+}
+
+/**
+ This function will be called to accept pages. BSP and APs are invokded
+ to do the task together.
+
+ TDCALL(ACCEPT_PAGE) supports the accept page size of 4k and 2M. To
+ simplify the implementation, the Memory to be accpeted is splitted
+ into 3 parts:
+ ----------------- <-- StartAddress1 (not 2M aligned)
+ | part 1 | Length1 < 2M
+ |---------------| <-- StartAddress2 (2M aligned)
+ | | Length2 = Integer multiples of 2M
+ | part 2 |
+ | |
+ |---------------| <-- StartAddress3
+ | part 3 | Length3 < 2M
+ |---------------|
+
+ part 1) will be accepted in 4k and by BSP.
+ Part 2) will be accepted in 2M and by BSP/AP.
+ Part 3) will be accepted in 4k and by BSP.
+
+ @param[in] PhysicalAddress Start physical adress
+ @param[in] PhysicalEnd End physical address
+
+ @retval EFI_SUCCESS Accept memory successfully
+ @retval Others Other errors as indicated
+**/
+EFI_STATUS
+EFIAPI
+MpAcceptMemoryResourceRange (
+ IN EFI_PHYSICAL_ADDRESS PhysicalAddress,
+ IN EFI_PHYSICAL_ADDRESS PhysicalEnd
+ )
+{
+ EFI_STATUS Status;
+ UINT64 AcceptChunkSize;
+ UINT32 AcceptPageSize;
+ UINT64 StartAddress1;
+ UINT64 StartAddress2;
+ UINT64 StartAddress3;
+ UINT64 TotalLength;
+ UINT64 Length1;
+ UINT64 Length2;
+ UINT64 Length3;
+ UINT32 Index;
+ UINT32 CpusNum;
+ volatile MP_WAKEUP_MAILBOX *MailBox;
+
+ AcceptChunkSize = FixedPcdGet64 (PcdTdxAcceptChunkSize);
+ AcceptPageSize = FixedPcdGet32 (PcdTdxAcceptPageSize);
+ TotalLength = PhysicalEnd - PhysicalAddress;
+ StartAddress1 = 0;
+ StartAddress2 = 0;
+ StartAddress3 = 0;
+ Length1 = 0;
+ Length2 = 0;
+ Length3 = 0;
+
+ if (AcceptPageSize == SIZE_4KB || TotalLength <= SIZE_2MB) {
+ //
+ // if total length is less than 2M, then we accept pages in 4k
+ //
+ StartAddress1 = 0;
+ Length1 = 0;
+ StartAddress2 = PhysicalAddress;
+ Length2 = PhysicalEnd - PhysicalAddress;
+ StartAddress3 = 0;
+ Length3 = 0;
+ AcceptPageSize = SIZE_4KB;
+ } else if (AcceptPageSize == SIZE_2MB) {
+ //
+ // Total length is bigger than 2M and Page Accept size 2M is supported.
+ //
+ if ((PhysicalAddress & ALIGNED_2MB_MASK) == 0) {
+ //
+ // Start address is 2M aligned
+ //
+ StartAddress1 = 0;
+ Length1 = 0;
+ StartAddress2 = PhysicalAddress;
+ Length2 = TotalLength & ~(UINT64)ALIGNED_2MB_MASK;
+
+ if (TotalLength > Length2) {
+ //
+ // There is remaining part 3)
+ //
+ StartAddress3 = StartAddress2 + Length2;
+ Length3 = TotalLength - Length2;
+ ASSERT (Length3 < SIZE_2MB);
+ }
+ } else {
+ //
+ // Start address is not 2M aligned and total length is bigger than 2M.
+ //
+ StartAddress1 = PhysicalAddress;
+ ASSERT (TotalLength > SIZE_2MB);
+ Length1 = SIZE_2MB - (PhysicalAddress & ALIGNED_2MB_MASK);
+ if (TotalLength - Length1 < SIZE_2MB) {
+ //
+ // The Part 2) length is less than 2MB, so let's accept all the
+ // memory in 4K
+ //
+ Length1 = TotalLength;
+
+ } else {
+ StartAddress2 = PhysicalAddress + Length1;
+ Length2 = (TotalLength - Length1) & ~(UINT64)ALIGNED_2MB_MASK;
+ Length3 = TotalLength - Length1 - Length2;
+ StartAddress3 = Length3 > 0 ? StartAddress2 + Length2 : 0;
+ ASSERT (Length3 < SIZE_2MB);
+ }
+ }
+ }
+
+ DEBUG ((DEBUG_INFO, "TdAccept: 0x%llx - 0x%llx\n", PhysicalAddress, TotalLength));
+ DEBUG ((DEBUG_INFO, " Part1: 0x%llx - 0x%llx\n", StartAddress1, Length1));
+ DEBUG ((DEBUG_INFO, " Part2: 0x%llx - 0x%llx\n", StartAddress2, Length2));
+ DEBUG ((DEBUG_INFO, " Part3: 0x%llx - 0x%llx\n", StartAddress3, Length3));
+ DEBUG ((DEBUG_INFO, " Chunk: 0x%llx, Page : 0x%llx\n", AcceptChunkSize, AcceptPageSize));
+
+ MpSerializeStart ();
+
+ if (Length2 > 0) {
+ MpSendWakeupCommand (
+ MpProtectedModeWakeupCommandAcceptPages,
+ 0,
+ StartAddress2,
+ StartAddress2 + Length2,
+ AcceptChunkSize,
+ AcceptPageSize);
+
+ Status = BspAcceptMemoryResourceRange (
+ StartAddress2,
+ Length2,
+ AcceptChunkSize,
+ AcceptPageSize);
+ ASSERT (!EFI_ERROR (Status));
+ }
+
+ if (Length1 > 0) {
+ Status = BspAcceptMemoryResourceRange (
+ StartAddress1,
+ Length1,
+ AcceptChunkSize,
+ SIZE_4KB);
+ ASSERT (!EFI_ERROR (Status));
+ }
+
+ if (Length3 > 0) {
+ Status = BspAcceptMemoryResourceRange (
+ StartAddress3,
+ Length3,
+ AcceptChunkSize,
+ SIZE_4KB);
+ ASSERT (!EFI_ERROR (Status));
+ }
+
+ MpSerializeEnd ();
+
+ CpusNum = GetCpusNum ();
+ MailBox = (volatile MP_WAKEUP_MAILBOX *) GetTdxMailBox ();
+
+ for (Index = 0; Index < CpusNum; Index++) {
+ if (MailBox->Errors[Index] > 0) {
+ Status = EFI_DEVICE_ERROR;
+ DEBUG ((DEBUG_ERROR, "Error(%d) of CPU-%d when accepting memory\n",
+ MailBox->Errors[Index], Index));
+ }
+ }
+
+ return Status;
+}
+
+/**
+ Dump out the hob list
+
+ @param[in] HobStart Start address of the hob list
+**/
+VOID
+EFIAPI
+DEBUG_HOBLIST (
+ IN CONST VOID *HobStart
+ )
+{
+ EFI_PEI_HOB_POINTERS Hob;
+ Hob.Raw = (UINT8 *) HobStart;
+ //
+ // Parse the HOB list until end of list or matching type is found.
+ //
+ while (!END_OF_HOB_LIST (Hob)) {
+ DEBUG ((DEBUG_INFO, "HOB(%p) : %x %x\n", Hob, Hob.Header->HobType, Hob.Header->HobLength));
+ switch (Hob.Header->HobType) {
+ case EFI_HOB_TYPE_RESOURCE_DESCRIPTOR:
+ DEBUG ((DEBUG_INFO, "\t: %x %x %llx %llx\n",
+ Hob.ResourceDescriptor->ResourceType,
+ Hob.ResourceDescriptor->ResourceAttribute,
+ Hob.ResourceDescriptor->PhysicalStart,
+ Hob.ResourceDescriptor->ResourceLength));
+
+ break;
+ case EFI_HOB_TYPE_MEMORY_ALLOCATION:
+ DEBUG ((DEBUG_INFO, "\t: %llx %llx %x\n",
+ Hob.MemoryAllocation->AllocDescriptor.MemoryBaseAddress,
+ Hob.MemoryAllocation->AllocDescriptor.MemoryLength,
+ Hob.MemoryAllocation->AllocDescriptor.MemoryType));
+ break;
+ default:
+ break;
+ }
+ Hob.Raw = GET_NEXT_HOB (Hob);
+ }
+}
+
+/**
+ Check the value whether in the valid list.
+
+ @param[in] Value A value
+ @param[in] ValidList A pointer to valid list
+ @param[in] ValidListLength Length of valid list
+
+ @retval TRUE The value is in valid list.
+ @retval FALSE The value is not in valid list.
+
+**/
+BOOLEAN
+EFIAPI
+IsInValidList (
+ IN UINT32 Value,
+ IN UINT32 *ValidList,
+ IN UINT32 ValidListLength
+) {
+ UINT32 index;
+
+ if (ValidList == NULL) {
+ return FALSE;
+ }
+
+ for (index = 0; index < ValidListLength; index ++) {
+ if (ValidList[index] == Value) {
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+/**
+ Check the integrity of VMM Hob List.
+
+ @param[in] VmmHobList A pointer to Hob List
+
+ @retval TRUE The Hob List is valid.
+ @retval FALSE The Hob List is invalid.
+
+**/
+BOOLEAN
+EFIAPI
+ValidateHobList (
+ IN CONST VOID *VmmHobList
+ )
+{
+ EFI_PEI_HOB_POINTERS Hob;
+ UINT32 EFI_BOOT_MODE_LIST[12] = { BOOT_WITH_FULL_CONFIGURATION,
+ BOOT_WITH_MINIMAL_CONFIGURATION,
+ BOOT_ASSUMING_NO_CONFIGURATION_CHANGES,
+ BOOT_WITH_FULL_CONFIGURATION_PLUS_DIAGNOSTICS,
+ BOOT_WITH_DEFAULT_SETTINGS,
+ BOOT_ON_S4_RESUME,
+ BOOT_ON_S5_RESUME,
+ BOOT_WITH_MFG_MODE_SETTINGS,
+ BOOT_ON_S2_RESUME,
+ BOOT_ON_S3_RESUME,
+ BOOT_ON_FLASH_UPDATE,
+ BOOT_IN_RECOVERY_MODE
+ };
+
+ UINT32 EFI_RESOURCE_TYPE_LIST[8] = { EFI_RESOURCE_SYSTEM_MEMORY,
+ EFI_RESOURCE_MEMORY_MAPPED_IO,
+ EFI_RESOURCE_IO,
+ EFI_RESOURCE_FIRMWARE_DEVICE,
+ EFI_RESOURCE_MEMORY_MAPPED_IO_PORT,
+ EFI_RESOURCE_MEMORY_RESERVED,
+ EFI_RESOURCE_IO_RESERVED,
+ EFI_RESOURCE_MAX_MEMORY_TYPE
+ };
+
+ if (VmmHobList == NULL) {
+ DEBUG ((DEBUG_ERROR, "HOB: HOB data pointer is NULL\n"));
+ return FALSE;
+ }
+
+ Hob.Raw = (UINT8 *) VmmHobList;
+
+ //
+ // Parse the HOB list until end of list or matching type is found.
+ //
+ while (!END_OF_HOB_LIST (Hob)) {
+ if (Hob.Header->Reserved != (UINT32) 0) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob header Reserved filed should be zero\n"));
+ return FALSE;
+ }
+
+ if (Hob.Header->HobLength == 0) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob header LEANGTH should not be zero\n"));
+ return FALSE;
+ }
+
+ switch (Hob.Header->HobType) {
+ case EFI_HOB_TYPE_HANDOFF:
+ if (Hob.Header->HobLength != sizeof(EFI_HOB_HANDOFF_INFO_TABLE)) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_HANDOFF));
+ return FALSE;
+ }
+
+ if (IsInValidList (Hob.HandoffInformationTable->BootMode, EFI_BOOT_MODE_LIST, 12) == FALSE) {
+ DEBUG ((DEBUG_ERROR, "HOB: Unknow HandoffInformationTable BootMode type. Type: 0x%08x\n", Hob.HandoffInformationTable->BootMode));
+ return FALSE;
+ }
+
+ if ((Hob.HandoffInformationTable->EfiFreeMemoryTop % 4096) != 0) {
+ DEBUG ((DEBUG_ERROR, "HOB: HandoffInformationTable EfiFreeMemoryTop address must be 4-KB aligned to meet page restrictions of UEFI.\
+ Address: 0x%016lx\n", Hob.HandoffInformationTable->EfiFreeMemoryTop));
+ return FALSE;
+ }
+ break;
+
+ case EFI_HOB_TYPE_RESOURCE_DESCRIPTOR:
+ if (Hob.Header->HobLength != sizeof(EFI_HOB_RESOURCE_DESCRIPTOR)) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_RESOURCE_DESCRIPTOR));
+ return FALSE;
+ }
+
+ if (IsInValidList (Hob.ResourceDescriptor->ResourceType, EFI_RESOURCE_TYPE_LIST, 8) == FALSE) {
+ DEBUG ((DEBUG_ERROR, "HOB: Unknow ResourceDescriptor ResourceType type. Type: 0x%08x\n", Hob.ResourceDescriptor->ResourceType));
+ return FALSE;
+ }
+
+ if ((Hob.ResourceDescriptor->ResourceAttribute & (~(EFI_RESOURCE_ATTRIBUTE_PRESENT |
+ EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+ EFI_RESOURCE_ATTRIBUTE_TESTED |
+ EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED |
+ EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED |
+ EFI_RESOURCE_ATTRIBUTE_PERSISTENT |
+ EFI_RESOURCE_ATTRIBUTE_SINGLE_BIT_ECC |
+ EFI_RESOURCE_ATTRIBUTE_MULTIPLE_BIT_ECC |
+ EFI_RESOURCE_ATTRIBUTE_ECC_RESERVED_1 |
+ EFI_RESOURCE_ATTRIBUTE_ECC_RESERVED_2 |
+ EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
+ EFI_RESOURCE_ATTRIBUTE_16_BIT_IO |
+ EFI_RESOURCE_ATTRIBUTE_32_BIT_IO |
+ EFI_RESOURCE_ATTRIBUTE_64_BIT_IO |
+ EFI_RESOURCE_ATTRIBUTE_UNCACHED_EXPORTED |
+ EFI_RESOURCE_ATTRIBUTE_READ_PROTECTABLE |
+ EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTABLE |
+ EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTABLE |
+ EFI_RESOURCE_ATTRIBUTE_PERSISTABLE |
+ EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTED |
+ EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTABLE |
+ EFI_RESOURCE_ATTRIBUTE_MORE_RELIABLE |
+ EFI_RESOURCE_ATTRIBUTE_ENCRYPTED))) != 0) {
+ DEBUG ((DEBUG_ERROR, "HOB: Unknow ResourceDescriptor ResourceAttribute type. Type: 0x%08x\n", Hob.ResourceDescriptor->ResourceAttribute));
+ return FALSE;
+ }
+ break;
+
+ // EFI_HOB_GUID_TYPE is variable length data, so skip check
+ case EFI_HOB_TYPE_GUID_EXTENSION:
+ break;
+
+ case EFI_HOB_TYPE_FV:
+ if (Hob.Header->HobLength != sizeof (EFI_HOB_FIRMWARE_VOLUME)) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_FV));
+ return FALSE;
+ }
+ break;
+
+ case EFI_HOB_TYPE_FV2:
+ if (Hob.Header->HobLength != sizeof(EFI_HOB_FIRMWARE_VOLUME2)) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_FV2));
+ return FALSE;
+ }
+ break;
+
+ case EFI_HOB_TYPE_FV3:
+ if (Hob.Header->HobLength != sizeof(EFI_HOB_FIRMWARE_VOLUME3)) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_FV3));
+ return FALSE;
+ }
+ break;
+
+ case EFI_HOB_TYPE_CPU:
+ if (Hob.Header->HobLength != sizeof(EFI_HOB_CPU)) {
+ DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_CPU));
+ return FALSE;
+ }
+
+ for (UINT32 index = 0; index < 6; index ++) {
+ if (Hob.Cpu->Reserved[index] != 0) {
+ DEBUG ((DEBUG_ERROR, "HOB: Cpu Reserved field will always be set to zero.\n"));
+ return FALSE;
+ }
+ }
+ break;
+
+ default:
+ DEBUG ((DEBUG_ERROR, "HOB: Hob type is not know. Type: 0x%04x\n", Hob.Header->HobType));
+ return FALSE;
+ }
+ // Get next HOB
+ Hob.Raw = (UINT8 *) (Hob.Raw + Hob.Header->HobLength);
+ }
+
+ return TRUE;
+}
+
+/**
+ Processing the incoming HobList for the TDX
+
+ Firmware must parse list, and accept the pages of memory before their can be
+ use by the guest.
+
+ @param[in] VmmHobList The Hoblist pass the firmware
+
+ @retval EFI_SUCCESS Process the HobList successfully
+ @retval Others Other errors as indicated
+
+**/
+EFI_STATUS
+EFIAPI
+ProcessHobList (
+ IN CONST VOID *VmmHobList
+ )
+{
+ EFI_STATUS Status;
+ EFI_PEI_HOB_POINTERS Hob;
+ EFI_PHYSICAL_ADDRESS PhysicalEnd;
+
+ Status = EFI_SUCCESS;
+ ASSERT (VmmHobList != NULL);
+ Hob.Raw = (UINT8 *) VmmHobList;
+
+ //
+ // Parse the HOB list until end of list or matching type is found.
+ //
+ while (!END_OF_HOB_LIST (Hob)) {
+
+ if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
+ DEBUG ((DEBUG_INFO, "\nResourceType: 0x%x\n", Hob.ResourceDescriptor->ResourceType));
+
+ if (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) {
+ DEBUG ((DEBUG_INFO, "ResourceAttribute: 0x%x\n", Hob.ResourceDescriptor->ResourceAttribute));
+ DEBUG ((DEBUG_INFO, "PhysicalStart: 0x%llx\n", Hob.ResourceDescriptor->PhysicalStart));
+ DEBUG ((DEBUG_INFO, "ResourceLength: 0x%llx\n", Hob.ResourceDescriptor->ResourceLength));
+ DEBUG ((DEBUG_INFO, "Owner: %g\n\n", &Hob.ResourceDescriptor->Owner));
+
+ PhysicalEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
+
+ Status = MpAcceptMemoryResourceRange (
+ Hob.ResourceDescriptor->PhysicalStart,
+ PhysicalEnd);
+ if (EFI_ERROR (Status)) {
+ break;
+ }
+ }
+ }
+ Hob.Raw = GET_NEXT_HOB (Hob);
+ }
+
+ return Status;
+}
+
+/**
+ In Tdx guest, some information need to be passed from host VMM to guest
+ firmware. For example, the memory resource, etc. These information are
+ prepared by host VMM and put in HobList which is described in TdxMetadata.
+
+ Information in HobList is treated as external input. From the security
+ perspective before it is consumed, it should be validated.
+
+ @retval EFI_SUCCESS Successfully process the hoblist
+ @retval Others Other error as indicated
+**/
+EFI_STATUS
+EFIAPI
+ProcessTdxHobList (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ VOID *TdHob;
+ TD_RETURN_DATA TdReturnData;
+
+ TdHob = (VOID *) (UINTN) FixedPcdGet32 (PcdOvmfSecGhcbBase);
+ Status = TdCall (TDCALL_TDINFO, 0, 0, 0, &TdReturnData);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ DEBUG ((DEBUG_INFO,
+ "Intel Tdx Started with (GPAW: %d, Cpus: %d)\n",
+ TdReturnData.TdInfo.Gpaw,
+ TdReturnData.TdInfo.NumVcpus
+ ));
+
+ //
+ // Validate HobList
+ //
+ if (ValidateHobList (TdHob) == FALSE) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Process Hoblist to accept memory
+ //
+ Status = ProcessHobList (TdHob);
+
+ return Status;
+}
diff --git a/OvmfPkg/Sec/IntelTdx.h b/OvmfPkg/Sec/IntelTdx.h
new file mode 100644
index 000000000000..9420f586b176
--- /dev/null
+++ b/OvmfPkg/Sec/IntelTdx.h
@@ -0,0 +1,33 @@
+/** @file
+
+ Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+#ifndef __INTEL_TDX_H__
+#define __INTEL_TDX_H__
+
+#include <PiPei.h>
+#include <Library/BaseLib.h>
+#include <Uefi/UefiSpec.h>
+#include <Uefi/UefiBaseType.h>
+#include <IndustryStandard/UefiTcgPlatform.h>
+
+/**
+ In Tdx guest, some information need to be passed from host VMM to guest
+ firmware. For example, the memory resource, etc. These information are
+ prepared by host VMM and put in HobList which is described in TdxMetadata.
+
+ Information in HobList is treated as external input. From the security
+ perspective before it is consumed, it should be validated.
+
+ @retval EFI_SUCCESS Successfully process the hoblist
+ @retval Others Other error as indicated
+**/
+EFI_STATUS
+EFIAPI
+ProcessTdxHobList (
+ VOID
+ );
+#endif
diff --git a/OvmfPkg/Sec/SecMain.c b/OvmfPkg/Sec/SecMain.c
index 707b0d4bbff4..56ee8c4a230c 100644
--- a/OvmfPkg/Sec/SecMain.c
+++ b/OvmfPkg/Sec/SecMain.c
@@ -29,8 +29,10 @@
#include <Library/MemEncryptSevLib.h>
#include <Register/Amd/Ghcb.h>
#include <Register/Amd/Msr.h>
-
+#include <IndustryStandard/Tdx.h>
+#include <Library/TdxLib.h>
#include <Ppi/TemporaryRamSupport.h>
+#include "IntelTdx.h"
#define SEC_IDT_ENTRY_COUNT 34
@@ -865,6 +867,24 @@ SevEsIsEnabled (
return (SevEsWorkArea->SevEsEnabled != 0);
}
+/**
+ Check TDX is enabled.
+
+ @retval TRUE TDX is enabled
+ @retval FALSE TDX is not enabled
+**/
+BOOLEAN
+SecTdxIsEnabled (
+ VOID
+ )
+{
+ CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER *CcWorkAreaHeader;
+
+ CcWorkAreaHeader = (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER *) FixedPcdGet32 (PcdOvmfWorkAreaBase);
+ return (CcWorkAreaHeader != NULL && CcWorkAreaHeader->GuestType == GUEST_TYPE_INTEL_TDX);
+}
+
+
VOID
EFIAPI
SecCoreStartupWithStack (
@@ -878,6 +898,19 @@ SecCoreStartupWithStack (
UINT32 Index;
volatile UINT8 *Table;
+#if defined (MDE_CPU_X64)
+ if (SecTdxIsEnabled ()) {
+ //
+ // For Td guests, the memory map info is in TdHobLib. It should be processed
+ // first so that the memory is accepted. Otherwise access to the unaccepted
+ // memory will trigger tripple fault.
+ //
+ if (ProcessTdxHobList () != EFI_SUCCESS) {
+ CpuDeadLoop ();
+ }
+ }
+#endif
+
//
// To ensure SMM can't be compromised on S3 resume, we must force re-init of
// the BaseExtractGuidedSectionLib. Since this is before library contructors
@@ -895,13 +928,20 @@ SecCoreStartupWithStack (
// we use a loop rather than CopyMem.
//
IdtTableInStack.PeiService = NULL;
+
for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {
- UINT8 *Src;
- UINT8 *Dst;
- UINTN Byte;
+ //
+ // Declare the local variables that actually move the data elements as
+ // volatile to prevent the optimizer from replacing this function with
+ // the intrinsic memcpy()
+ //
+ CONST UINT8 *Src;
+ volatile UINT8 *Dst;
+ UINTN Byte;
+
+ Src = (CONST UINT8 *) &mIdtEntryTemplate;
+ Dst = (volatile UINT8 *) &IdtTableInStack.IdtTable[Index];
- Src = (UINT8 *) &mIdtEntryTemplate;
- Dst = (UINT8 *) &IdtTableInStack.IdtTable[Index];
for (Byte = 0; Byte < sizeof (mIdtEntryTemplate); Byte++) {
Dst[Byte] = Src[Byte];
}
@@ -947,6 +987,14 @@ SecCoreStartupWithStack (
AsmEnableCache ();
}
+ if (SecTdxIsEnabled ()) {
+ //
+ // InitializeCpuExceptionHandlers () should be called in Td guests so that
+ // #VE exceptions can be handled correctly.
+ //
+ InitializeCpuExceptionHandlers (NULL);
+ }
+
DEBUG ((DEBUG_INFO,
"SecCoreStartupWithStack(0x%x, 0x%x)\n",
(UINT32)(UINTN)BootFv,
diff --git a/OvmfPkg/Sec/SecMain.inf b/OvmfPkg/Sec/SecMain.inf
index 6083fa21a433..4f16ff5d8330 100644
--- a/OvmfPkg/Sec/SecMain.inf
+++ b/OvmfPkg/Sec/SecMain.inf
@@ -28,6 +28,7 @@
Ia32/SecEntry.nasm
[Sources.X64]
+ IntelTdx.c
X64/SecEntry.nasm
[Packages]
@@ -51,6 +52,8 @@
ExtractGuidedSectionLib
LocalApicLib
CpuExceptionHandlerLib
+ TdxLib
+ TdxMailboxLib
[Ppis]
gEfiTemporaryRamSupportPpiGuid # PPI ALWAYS_PRODUCED
@@ -73,6 +76,9 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfConfidentialComputingWorkAreaHeader
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaBase
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecGhcbBackupBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdTdxAcceptChunkSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdTdxAcceptPageSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaBase
[FeaturePcd]
gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire
--
2.29.2.windows.2
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